About Us
About Reveluz
Leading the global copper foil industry for over 14 years with innovation, quality, and unwavering commitment to excellence. From our state-of-the-art facilities in Shanghai, we serve the world's most demanding high-tech industries.
Built on Excellence, Driven by Innovation
A journey of dedication, growth, and technological advancement
Founded in 2010, Reveluz emerged with a clear vision: to become the world's most trusted copper foil manufacturer by combining cutting-edge technology with uncompromising quality standards. What started as a specialized producer serving the Chinese market has evolved into a global leader supplying premium copper foil solutions to over 50 countries across six continents.
Our state-of-the-art manufacturing facility in Shanghai's Fengxian District spans 80,000 square meters, equipped with the latest automated production lines and precision quality control systems. We employ over 500 skilled professionals, including 80+ engineers and researchers dedicated to advancing copper foil technology and developing next-generation materials.
Today, Reveluz stands as a trusted partner to industry giants in electric vehicles, consumer electronics, telecommunications, semiconductors, and renewable energy sectors. Our commitment to innovation, quality, and customer success continues to drive our growth and solidify our position as a global industry leader.
Established in Shanghai with focus on lithium battery copper foil production
Expanded product line to include PCB and flexible copper foils, doubled production capacity
Achieved ISO 9001, CE, and RoHS certifications; entered international markets
Launched ultra-thin 4.5μm battery foil and carbon-coated advanced materials
Opened R&D facility for semiconductor and 5G applications research
Reached 50,000 tons annual capacity, serving 500+ global clients
World-Class Production Capabilities
Advanced facilities and technology delivering precision at scale
Advanced Manufacturing Facility
Our 80,000㎡ state-of-the-art production complex in Shanghai features fully automated production lines with real-time quality monitoring systems.
- 12 automated production lines
- Annual capacity: 50,000+ tons
- 24/7 continuous operation
- ISO Class 7 cleanroom environment
- 100% traceability system
Precision Engineering
Ultra-precision equipment capable of producing foils from 3μm to 140μm thickness with exceptional dimensional accuracy and surface quality.
- Thickness tolerance: ±0.5μm
- Surface roughness: Ra < 0.3μm
- Width capacity: up to 1350mm
- Rolling precision: ±0.001mm
- Automated thickness control
R&D Innovation Center
Dedicated research facility with 80+ engineers developing next-generation materials and advanced manufacturing processes.
- 25+ granted patents
- Carbon coating technology
- Composite foil development
- Material science lab
- Industry partnerships
Quality Testing Laboratory
Comprehensive in-house testing facility equipped with advanced analytical instruments for complete material characterization.
- ICP-OES purity analysis
- SEM surface inspection
- Tensile strength testing
- Conductivity measurement
- 100% batch inspection
Environmental Sustainability
Green manufacturing practices with advanced waste treatment systems and energy-efficient operations.
- 99% copper recycling rate
- Wastewater treatment plant
- Solar power integration
- Zero hazardous discharge
- ISO 14001 certified
Logistics & Distribution
Strategic warehousing and efficient distribution network ensuring timely delivery worldwide.
- 3 continental warehouses
- 99.2% on-time delivery
- Express shipping available
- Temperature-controlled storage
- Real-time tracking system
Electrolytic Copper Foil Production Process
Advanced multi-stage electrodeposition and surface treatment technology
Raw Material Preparation
High-purity copper cathode (99.99%+)
Electrolyte Solution
H₂SO₄ + CuSO₄ solution preparation
Electrodeposition
Copper deposition on titanium drum
Surface Treatment
Roughening & oxidation treatment
Cutting & Slitting
Precision cutting to specification
Quality Inspection
Multi-parameter testing & certification
Detailed Production Stages & Technical Specifications
Raw Material Preparation & Quality Control
High-Purity Copper Cathode Selection: We source electrolytic copper cathodes with purity ≥99.99% (4N grade) from certified suppliers. Each batch undergoes rigorous incoming inspection using ICP-OES (Inductively Coupled Plasma Optical Emission Spectroscopy) to verify purity and detect trace impurities.
Impurity Analysis: Critical impurities that affect foil quality are controlled at extremely low levels:
| Element | Maximum Allowable | Typical Actual | Impact on Product |
|---|---|---|---|
| Oxygen (O) | 50 ppm | 15-25 ppm | Affects ductility and elongation |
| Silver (Ag) | 30 ppm | 10-15 ppm | Increases hardness, reduces formability |
| Lead (Pb) | 5 ppm | <1 ppm | Creates surface defects, reduces adhesion |
| Iron (Fe) | 10 ppm | 2-5 ppm | Decreases conductivity, causes roughness |
| Sulfur (S) | 15 ppm | 3-8 ppm | Reduces ductility, creates brittleness |
| Arsenic (As) | 5 ppm | <1 ppm | Severely impacts electrical properties |
Material Processing: Copper cathodes are mechanically cleaned, degreased with alkaline solution (pH 10-11), and acid-etched (5% H₂SO₄) to remove surface oxides. Material is then cut into optimal anode sizes (600mm × 800mm) for electrodeposition tanks.
Electrolyte Solution Preparation & Maintenance
Electrolyte Composition: The acidic copper sulfate electrolyte is the heart of the electrodeposition process. Precise control of composition directly impacts foil quality, deposition rate, and current efficiency.
Standard Electrolyte Formula
Continuous Monitoring System: Automated online monitoring maintains optimal electrolyte conditions:
🌡️ Temperature Control
Range: 50-60°C (±0.5°C)
System: Heat exchangers with PID control
Impact: Every 5°C increase doubles reaction rate
📊 Concentration Monitoring
Cu²⁺: Real-time UV-Vis spectroscopy
H₂SO₄: Automated titration every 2 hours
Additives: HPLC analysis daily
🔄 Filtration System
Primary: 25μm cartridge filters
Secondary: 5μm activated carbon
Flow: Complete bath circulation every 30 min
⚗️ pH Management
Target: 0.3-0.6 (highly acidic)
Measurement: Online pH sensors
Adjustment: Automated H₂SO₄ dosing
Additive Package Selection: Different product types require specific additive packages:
| Product Type | Primary Additives | Leveling Agent | Brightener | Carrier |
|---|---|---|---|---|
| Ultra-Thin Battery (4.5-6μm) | Modified gelatin 3-5 ppm | Polyethylene glycol 8-12 ppm | Thiourea 2-4 ppm | Cl⁻ 40-50 ppm |
| Standard Battery (8-12μm) | Animal glue 2-4 ppm | PEG-4000 5-10 ppm | Benzotriazole 1-3 ppm | Cl⁻ 35-45 ppm |
| PCB Foil (18-35μm) | Organic polymer 5-8 ppm | Surfactant blend 10-15 ppm | Dextrin 3-5 ppm | Cl⁻ 30-40 ppm |
| High-Frequency (RTF/VLP) | Specialty polymer 8-12 ppm | Advanced leveler 15-20 ppm | Phenol derivative 2-4 ppm | Cl⁻ 45-55 ppm |
Electrodeposition Process & Crystal Growth Control
Electrochemical Cell Configuration: Our production uses vertical continuous electrodeposition with rotating titanium cathode drums. The cell design ensures uniform current distribution and consistent foil thickness across the entire width.
⚙️ Cathode System
- Material: Grade 1 titanium drum
- Diameter: 1200-1800mm
- Width: 1350mm (active)
- Surface: Mirror-polished Ra<0.05μm
- Rotation: 8-30 m/min variable speed
- Cooling: Internal water circulation
⚡ Anode System
- Material: 99.99% copper plates
- Configuration: 12-16 anodes per cell
- Spacing: 80-120mm from cathode
- Dimensions: 600×800×25mm each
- Replacement: Automatic when 40% consumed
🔌 Power Supply
- Type: Switch-mode DC rectifier
- Output: 0-15,000A per cell
- Voltage: 0-12V adjustable
- Ripple: <0.5% (ultra-low noise)
- Control: Digital feedback control
- Efficiency: >95%
Current Density Programming: Different foil thicknesses require optimized current density profiles for optimal crystal structure and mechanical properties:
Current Density Profiles by Product Type
| Foil Thickness | Current Density (A/dm²) | Deposition Time | Drum Speed (m/min) | Energy Consumption (kWh/kg) |
|---|---|---|---|---|
| 3-4.5μm (Ultra-Thin) | 20-28 | 0.15-0.20 hours | 8-12 | 2.8-3.2 |
| 6μm (Thin Battery) | 28-35 | 0.25-0.30 hours | 12-16 | 2.5-2.9 |
| 8-12μm (Standard) | 35-45 | 0.35-0.50 hours | 16-22 | 2.2-2.6 |
| 18-35μm (PCB) | 45-55 | 0.60-1.20 hours | 20-28 | 2.0-2.4 |
| 70-140μm (Power) | 50-60 | 2.5-5.0 hours | 22-30 | 1.9-2.3 |
Crystal Structure Engineering: Copper foil microstructure directly impacts mechanical and electrical properties. We control grain size, orientation, and morphology through precise parameter management:
Grain Size Control
Target Range: 0.5-5.0 μm
Measurement: Cross-sectional SEM analysis
Control Factors:
- Higher Cl⁻ concentration → Smaller grains
- Lower current density → Larger grains
- Organic additives → Refined grain structure
Crystal Orientation
Preferred: (111) plane for ductility
Analysis: XRD texture coefficient
Typical Values:
- TC(111): 2.5-3.5 (highly oriented)
- TC(200): 0.3-0.8 (minimized)
- TC(220): 0.2-0.5 (minimized)
Deposit Morphology
Structure: Columnar crystals
Shiny Side (S): Fine-grained, smooth
Matte Side (M): Nodular, textured
Control: Additive balance critical
Surface Treatment & Functional Coating
Multi-Stage Surface Processing: After electrodeposition, copper foil undergoes specialized surface treatments to enhance adhesion, prevent oxidation, and improve functional performance:
Step 1: Nodule Formation (Roughening)
Purpose: Increase surface area for enhanced adhesion to resin/substrate
Method: Electrochemical roughening in specialized bath
Bath Composition:
- CuSO₄: 50-80 g/L
- H₂SO₄: 80-100 g/L
- Pb²⁺: 0.5-2 g/L (nucleation promoter)
- Temperature: 30-40°C
Current Density: 10-30 A/dm² (pulsed)
Time: 5-20 seconds
Result: Dendritic copper nodules 2-8μm height
Step 2: Anti-Oxidation Treatment
Purpose: Form protective barrier against atmospheric oxidation
Methods Available:
| Treatment Type | Coating Material | Thickness | Application |
|---|---|---|---|
| Brown Oxide | Cu₂O/CuO | 0.2-0.5 μm | PCB, standard applications |
| Black Oxide | CuO | 0.3-0.8 μm | FPC, high adhesion required |
| Red Oxide | Cu₂O | 0.15-0.3 μm | Thin foils, minimal weight |
| Chromate | CrO₃ complex | 0.05-0.15 μm | Long-term storage protection |
| Silane | Organosilane | 0.01-0.05 μm | Environmentally friendly |
Step 3: Functional Coating (Advanced Products)
Carbon Coating (Battery Foil):
- Material: Conductive carbon + PVDF binder
- Thickness: 0.8-2.0 μm per side
- Method: Precision slot-die coating
- Benefits: 30% improved cycle life, reduced Li dendrites
- Conductivity: Maintains >95% base Cu conductivity
Zinc/Nickel Plating (EMI Shielding):
- Zinc Layer: 0.5-2.0 μm (corrosion protection)
- Nickel Layer: 0.1-0.5 μm (solderable surface)
- Process: Electrolytic plating in series
- Shielding: >90dB effectiveness at 1GHz
Surface Roughness Specifications by Product
| Product Type | Shiny Side Ra (μm) | Shiny Side Rz (μm) | Matte Side Ra (μm) | Matte Side Rz (μm) | Peel Strength (N/mm) |
|---|---|---|---|---|---|
| Battery Foil (Untreated) | 0.15-0.25 | 1.0-2.0 | 0.20-0.30 | 1.5-2.5 | N/A |
| STD Copper Foil (PCB) | 0.20-0.35 | 1.5-2.5 | 1.20-1.80 | 6.0-9.0 | ≥0.70 |
| RTF (Reverse Treated) | 1.00-1.50 | 5.0-8.0 | 0.25-0.40 | 2.0-3.5 | ≥0.80 |
| VLP (Very Low Profile) | 0.30-0.50 | 2.5-4.0 | 0.80-1.20 | 4.5-6.5 | ≥0.75 |
| HVLP (Hyper Low Profile) | 0.25-0.40 | 2.0-3.2 | 0.50-0.80 | 3.0-5.0 | ≥0.85 |
Precision Cutting, Slitting & Edge Treatment
High-Precision Slitting System: Our automated slitting lines achieve exceptional accuracy while maintaining foil integrity and edge quality:
🔪 Slitting Equipment
- Type: Rotary shear slitting
- Blade Material: Tungsten carbide
- Blade Sharpness: <5μm edge radius
- Speed: Up to 200 m/min
- Width Range: 3mm - 1350mm
- Tolerance: ±0.5mm on width
📏 Dimensional Control
- Width Measurement: Laser micrometer
- Frequency: Every 10 meters
- Feedback: Real-time adjustment
- Edge Inspection: Vision system
- Burr Detection: <5μm allowed
- Straightness: <2mm/m deviation
📦 Winding & Packaging
- Core Material: ABS plastic
- Core ID: 76mm or 152mm
- Tension Control: Automatic (10-50N)
- Roll OD: Up to 600mm
- Moisture Barrier: Multi-layer film
- Vacuum Sealing: <5% humidity
Edge Quality Requirements: Different applications require specific edge treatments and quality standards:
| Application | Edge Type | Burr Height | Edge Roughness | Special Treatment |
|---|---|---|---|---|
| Battery Electrode | Clean cut | <3μm | Smooth | Ultrasonic cleaning |
| FPC (Flexible) | Rounded edge | <2μm | Ra <0.5μm | Electropolishing |
| PCB Manufacturing | Square edge | <5μm | Standard | Deburring brush |
| EMI Shielding | Sharp edge | <4μm | Standard | None required |
Comprehensive Quality Inspection & Certification
Multi-Layer Quality Assurance: Every production lot undergoes rigorous testing at multiple checkpoints to ensure 100% compliance with specifications:
📏 Dimensional Inspection
Equipment: Laser micrometer, digital caliper
Parameters Measured:
- Thickness: Every 1m along length
- Width: Continuous laser measurement
- Length: Encoder-based tracking
- Uniformity: Statistical analysis (Cpk >1.67)
Acceptance: 100% within tolerance
🔬 Microstructure Analysis
Equipment: SEM, XRD, optical microscope
Tests Performed:
- Grain size distribution (every 500kg)
- Crystal orientation (TC measurement)
- Cross-section analysis (columnar structure)
- Surface morphology (nodule distribution)
Frequency: Sample from each batch
⚡ Electrical Testing
Equipment: 4-wire resistance meter, LCR meter
Measurements:
- Resistivity @ 20°C (every roll)
- Conductivity (% IACS calculation)
- Surface resistance (4-point probe)
- Insulation resistance (for coated foils)
Standard: ≥100% IACS (annealed)
💪 Mechanical Testing
Equipment: Universal testing machine, peel tester
Tests:
- Tensile strength (ASTM E8)
- Elongation at break (%)
- Peel strength 90° (for treated foils)
- Bend test (MIT folding endurance)
Sample Size: 5 specimens per test
🧪 Chemical Analysis
Equipment: ICP-OES, LECO analyzer
Elements Tested:
- Cu purity (every production lot)
- O, S, H content (gas analyzers)
- Trace elements (As, Pb, Fe, Ni, etc.)
- RoHS compliance verification
Limits: Per material specification
👁️ Surface Quality Inspection
Equipment: Automated optical inspection (AOI)
Defect Detection:
- Pinholes (size & density)
- Scratches, dents, wrinkles
- Discoloration, stains
- Coating uniformity (for treated foils)
Coverage: 100% online inspection
Documentation Package: Each shipment includes comprehensive quality documentation:
Electrochemical Reaction Principles & Thermodynamics
Cathode Reaction (Reduction - Deposition)
Copper ions in solution are reduced to metallic copper on the rotating titanium cathode drum, forming continuous copper foil.
Standard Reduction Potential: E° = +0.337 V vs SHE
Gibbs Free Energy: ΔG° = -65.0 kJ/mol
Activation Energy: Ea = 35-45 kJ/mol
Anode Reaction (Oxidation - Dissolution)
High-purity copper anode dissolves, replenishing Cu²⁺ ions in the electrolyte solution to maintain stable concentration.
Standard Oxidation Potential: E° = -0.337 V vs SHE
Dissolution Rate: Proportional to current density
Anode Efficiency: 99.5-99.9%
Overall Cell Reaction & Energy Balance
Net copper transfer from anode to cathode through ionic migration in electrolyte under applied DC voltage.
Cell Voltage: 0.3-0.8 V (includes overpotentials)
Energy Efficiency: 85-92% (thermal losses)
Heat Generation: I²R + overpotential losses
Faraday's Laws of Electrolysis - Theoretical Foundation
Faraday's First Law
The mass of substance deposited is directly proportional to the quantity of electricity passed:
m = mass deposited (g)
Q = total charge (Coulombs) = I × t
I = current (Amperes)
t = time (seconds)
M = atomic mass of copper = 63.546 g/mol
n = number of electrons = 2 (for Cu²⁺)
F = Faraday constant = 96,485 C/mol
Faraday's Second Law
For a given quantity of electricity, the mass of different substances deposited is proportional to their equivalent weights.
Current Efficiency Correction
In practice, current efficiency (η) is less than 100% due to side reactions and concentration polarization:
Typical η values: 95-99% (well-controlled conditions)
Factors affecting η: Temperature, concentration, current density, additives
Critical Process Parameters & Control Ranges
| Parameter | Unit | Standard Range | Ultra-Thin (≤6μm) | Purpose/Impact |
|---|---|---|---|---|
| Current Density | A/dm² | 30-50 | 20-35 | Controls deposition rate & grain structure |
| Bath Temperature | °C | 50-60 | 48-55 | Affects conductivity & ion mobility |
| Cu²⁺ Concentration | g/L | 80-100 | 85-95 | Maintains stable deposition rate |
| H₂SO₄ Concentration | g/L | 100-120 | 105-115 | Provides ionic conductivity |
| Chloride Ion (Cl⁻) | ppm | 30-60 | 40-50 | Grain refinement & surface smoothing |
| Organic Additives | ppm | 5-20 | 8-15 | Leveling agent for uniform deposition |
| pH Value | - | 0.2-0.8 | 0.3-0.6 | Stability of copper sulfate solution |
| Flow Rate | L/min | 80-120 | 100-140 | Mass transfer & boundary layer control |
| Drum Rotation Speed | m/min | 15-30 | 8-20 | Production speed & foil thickness |
| Applied Voltage | V | 0.3-0.8 | 0.2-0.5 | Energy efficiency & deposition quality |
Copper Foil Thickness Calculator
Calculate theoretical copper foil thickness based on electrodeposition parameters using Faraday's Law of Electrolysis
Theoretical Foundation: Faraday's Law
Interactive Production Calculator
Key Performance Indicators & Quality Metrics
Dimensional Accuracy
Electrical Properties
Mechanical Properties
Surface Quality
Chemical Composition
Thermal Properties
Production Capacity by Thickness Range
Our Competitive Advantages
What sets us apart in the global copper foil market
Technical Expertise
14+ years of specialized experience with deep understanding of application-specific requirements across all major industries and emerging technologies.
Production Capacity
50,000+ tons annual capacity with scalable infrastructure to meet growing demand while maintaining consistent quality and delivery schedules.
Quality Assurance
Quality rejection rate below 0.05% through rigorous multi-stage inspection and advanced automated testing systems.
Innovation Leadership
Continuous R&D investment in breakthrough materials including carbon-coated foils, composite technologies, and ultra-thin formulations.
Global Network
Serving 500+ clients across 50+ countries with established distribution channels and local technical support teams.
Customer Partnership
Dedicated account managers, 24/7 technical support, and collaborative approach from prototyping through mass production.
Certifications
ISO 9001, ISO 14001, CE, RoHS, and industry-specific certifications ensuring compliance with international standards.
Fast Response
Average 4-hour technical inquiry response time, expedited sampling service, and flexible production scheduling for urgent orders.
Comprehensive Quality Control System
Multi-stage inspection ensuring every meter meets the highest standards
Our quality control process encompasses every stage of production, from raw material verification to final product testing. With advanced analytical equipment and experienced quality engineers, we maintain a defect rate below 0.05% while ensuring 100% traceability for every batch.
Raw Material Inspection
- ICP-OES purity verification (99.99%+)
- Chemical composition analysis
- Impurity content detection
- Supplier certification review
- Material traceability documentation
In-Process Monitoring
- Real-time thickness measurement
- Surface quality inspection (SEM)
- Automated dimension control
- Temperature monitoring systems
- Statistical process control (SPC)
Physical Property Testing
- Tensile strength measurement
- Elongation rate testing
- Peel strength verification
- Bend cycle resistance (100k+)
- Dimensional stability analysis
Electrical Performance
- Conductivity testing (IACS%)
- Resistance measurement
- High-frequency performance
- EMI shielding effectiveness
- Thermal stability testing
Surface Quality Analysis
- Microscopic inspection (100x-1000x)
- Roughness measurement (Ra < 0.3μm)
- Oxidation resistance testing
- Coating uniformity verification
- Defect detection system
Final Product Certification
- 100% visual inspection
- Batch quality report (COA)
- Compliance documentation
- Customer specification verification
- Packaging integrity check
Transparent & Flexible Pricing Strategy
Value-driven pricing that maximizes your competitive advantage
Volume-Based Pricing
Attractive pricing tiers that reward larger orders while maintaining accessibility for small to medium-sized businesses.
- Minimum order quantity: 500kg (negotiable)
- 5-10% discount for orders over 5 tons
- 10-15% discount for orders over 20 tons
- 15-20% discount for annual contracts 100+ tons
- Custom pricing for strategic partnerships
Cost Optimization
Direct manufacturer pricing eliminating middleman markups, combined with operational efficiency savings passed to customers.
- Factory-direct pricing (no intermediaries)
- Transparent cost breakdown available
- No hidden fees or surcharges
- Long-term price stability agreements
- Copper price hedging options available
Value-Added Services
Comprehensive services included in pricing to maximize your total value and minimize additional costs.
- Free technical consultation
- Complimentary sample provision
- Custom specification development
- Quality documentation (COA/MSDS)
- After-sales technical support
Flexible Payment Terms
Customer-friendly payment options designed to support your cash flow and business operations.
- Net 30/60/90 terms for qualified buyers
- Letter of Credit (L/C) accepted
- T/T with deposit arrangements
- Progress payment for large orders
- Annual framework agreements available
Products & Comprehensive Services
End-to-end support from specification to delivery and beyond
Custom Product Development
Collaborative engineering to develop copper foil solutions tailored to your exact specifications, performance requirements, and application constraints. Our R&D team works closely with you from concept through commercialization.
Technical Consultation
Expert guidance on material selection, thickness optimization, surface treatments, and application-specific requirements. Our engineers provide detailed technical recommendations based on 14+ years of industry experience.
Rapid Sampling Service
Fast-track sample production and delivery within 3-5 business days. Complimentary samples available for qualified customers to validate material performance before placing production orders.
Custom Packaging Solutions
Flexible packaging options including custom spool sizes, protective wrapping, moisture barriers, and specialized containers to ensure product integrity during shipping and storage.
Global Logistics Support
Comprehensive shipping coordination including freight forwarding, customs documentation, and door-to-door delivery. Real-time shipment tracking and expedited shipping options available.
24/7 Customer Support
Dedicated account managers and technical support team available around the clock. Average 4-hour response time for technical inquiries with multilingual support in English, Chinese, and Japanese.
Quality Documentation
Complete certification package including Certificate of Analysis (COA), Material Safety Data Sheet (MSDS), RoHS/REACH compliance certificates, and batch traceability reports for every order.
Just-In-Time Delivery
Strategic inventory management and flexible production scheduling to support your JIT manufacturing requirements. Consignment inventory programs available for high-volume customers.
Technical Training
On-site or online training programs covering material handling, storage best practices, application techniques, and troubleshooting to optimize your manufacturing processes.
Serving the World
Global reach with local expertise and support
Partner With Reveluz
Experience the difference of working with a manufacturer that combines advanced technology, uncompromising quality, and customer-centric service. Contact our team today to discuss how we can support your copper foil requirements.
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We are Located Here
Reveluz® Copper Foil
Add: No. 521, Fengjin Road, Fengxian District, Shanghai, 201400, China.
Tel: +86-20-67192688
Fax: +86-20-67192686
E-mail: admin@reveluz.com, alexanderwon2011@gmail.com
